>> I noticed today that I'm starting to use up the 1 HD in one of my Linux
>> systems. So I'd like to add a second. Having never done this under
>> Linux before I thought I'd better ask for suggested reading before I
>> take on the task. Are there any pitfalls, or cautions I should be
>> careful of?

Should be pretty straightforward.

Just power the box down and install the second HDD, bring the machine
back up, figure out what device node the drive is on (usually if the
first disk is /dev/hda, the second is /dev/hdc if you also have a CD
drive).

Then you fdisk the drive to make any partitions you want, fsck the
drive to put a filesystem on there and then add a line to /etc/fstab
to have it mounted at boot time and you're done. I just did this on my
home system.

>> Since the server uses much of it's Disk space for web server staging I
>> figure I'll move the web server docs and the home directories there.
>> Any reason that's a bad idea?

Nope.

I got help on this topic last month. Moved /home to the new drive.
Works fine. Search the archives for instructions. The thread subject
was "Adding a new HD"